I launched a WordPress website on a GCE VM and connected it to cloud SQL database and the website ran perfectly. However when I did the same but on a GKE cluster the WordPress installation got stuck here: wp-admin/setup-config.php?step=2.
It just wouldn't load. I'm not sure whether this is a problem with scopes/permissions or something else.
If you did the same steps to install WordPress in GCE and GKE it will not work cuz its a different service architecture, for GKE you should use and follow the steps for Kubernetes (WordPress from GCP Marketplace); If you already use this steps to deploy your WordPress Containers I would suggest to check Stackdriver Logging to more information about this issue and also retrieve logs from the pods: